tty.c

拨打电话~发信息.基于MINIGUI写的

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <stdio.h>
#define BAUDRATE B9600          
#define COM3 "/dev/ttyS0"
static int fd;
static struct termios oldtio,newtio;
int tty_init()
{
        fd = open(COM3, O_RDWR );
        if (fd <0)
        {
                perror(COM3);
                exit(-1);
        }
                                                                                
  tcgetattr(fd,&oldtio);               
        bzero(&newtio, sizeof(newtio));
  newtio.c_cflag = BAUDRATE | /*CRTSCTS |*/ CS8 /*| CLOCAL | CREAD */;
        newtio.c_iflag = IGNPAR | ICRNL;
        newtio.c_oflag = 0;
        newtio.c_lflag = ICANON;
  newtio.c_cc[VINTR]    = 0;     /* Ctrl-c */
        newtio.c_cc[VQUIT]    = 0;     /* Ctrl-\ */
  newtio.c_cc[VERASE]   = 0;     /* del */
  newtio.c_cc[VKILL]    = 0;     /* @ */
  newtio.c_cc[VEOF]     = 4;     /* Ctrl-d */
  newtio.c_cc[VTIME]    = 0;     /* ???????????????????????? */
  newtio.c_cc[VMIN]     = 1;     /* ???????? 1 ?????????????? */
  newtio.c_cc[VSWTC]    = 0;     /* '\0' */
  newtio.c_cc[VSTART]   = 0;     /* Ctrl-q */
  newtio.c_cc[VSTOP]    = 0;     /* Ctrl-s */
  newtio.c_cc[VSUSP]    = 0;     /* Ctrl-z */
newtio.c_cc[VEOL]     = 0;     /* '\0' */
  newtio.c_cc[VREPRINT] = 0;     /* Ctrl-r */
  newtio.c_cc[VDISCARD] = 0;     /* Ctrl-u */
  newtio.c_cc[VWERASE]  = 0;     /* Ctrl-w */
  newtio.c_cc[VLNEXT]   = 0;     /* Ctrl-v */
  newtio.c_cc[VEOL2]    = 0; 
        tcflush(fd, TCIFLUSH);
        tcsetattr(fd,TCSANOW,&newtio); 
        return 0;
}
                                                                                
int tty_read(char *buf,int nbytes)
{
        int i,num;
        num = read(fd,buf,nbytes);
        for (i=0;i<num;i++)
                {
                printf("%c",buf[i]);
                }
        return num;
}
int tty_write(char *buf,int nbytes)
{
        int i;
        for(i=0; i<nbytes; i++)
        {
                write(fd,&buf[i],1);
                usleep(100);
        }
       
        return tcdrain(fd);
}
                                                                                
int tty_writecmd(char *buf,int nbytes)
{
        int i;
        for(i=0; i<nbytes; i++)
        {
                write(fd,&buf[i],1);
                usleep(100);
        }
        write(fd,"\r",1);

usleep(300000);
        
        return tcdrain(fd);
}
int tty_end()
{
      
        tcsetattr(fd,TCSANOW,&oldtio);
                                                                                
        
        close(fd);
}